Fireproof structure and material therefor



No. 623,492. Patented Apr. l8, I899.

.1. m. STIMPSON.

FIREPROOF STRUCTURE AND MATERIAL THEREFOR.

(Application filed Mar. 7, 18 98.)

(No Model.)

-4- ,3 ;//O I ,3 (g 9" W/TNESEES- //\/\/E/\/ 717 JOHN M. STIMPSON, OF BOSTON, MASSACHUSETTS.

FIREPROOF STRUCTURE AND MATERIAL THEREFOR.

SPECIFICATION forming part of Letters Patent No. 623,492, dated April 18, 1899.

Application filed March '7, 1898.

To (tZZ whom it may concern:

Be it known that I, JOHN M. STIMPSON, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, haveinvented certain new and useful Improvements in Fireproof Structures and Material Therefor, of which the following is a specification.

My invention relates to fireproof structures, such as buildings and the like, and to material used in making the same; and its nature and object will hereinafter be fully set forth.

In the accompanying drawings, Figure 1 is a side elevation of a portion of a wall of a building embodying my invention. Fig. 2 is a top plan view of a composite piece of timher to be used therein. Fig. 3 is a cross-section of the same on the line m :20; and Fig. 4 is a view similar to Fig. 3, showing the component parts of the timber slightly separated from one another.

Broadly speaking, my invention comprises a piece of building material presenting on its outside substantially the ordinary appearance and surface of the wooden stuff of which it is made, but having within its body portion one or more intersecting partitions or plates of incombustible material, such as metal, running lengthwise thereof in such manner that each transverse dimension. of the piece of material is intercepted by one or more of said fireproof partitions or plates.

Further, my invention comprises a fireproof structure, such as a building, made of a number of such pieces of material placed one upon another and united by means of rods passing through the same, as hereinafter more fully described.

In the drawings I have shown a piece of building material A in the form of a square stick of convenient length, constructedfof four separate pieces or strips 2, arranged with reference to one another, as shown in Fig. 3, a thin plate 3 of fireproof material, preferably sheet-tin, being laid on the inner face of each strip 2, with which it is commensurate, so that when the elements of the stick A are assembled said stick will be hollow, as shown,

Serial No. 672,816. (N0 odeL) and its interior will be lined with metal plates 3. The parts 2 and 3 aresecured together in any preferred manner, as by means of nails or screws.

I prefer to provide two of the opposite outside faces of the stick A with a coat of fireproofing material, such as asbestos paint or cement, as indicated at 4:. These coated faces are made to form the inside and outside walls of the building or other structure, which is preferably constructed as illustrated in Fig. 1, a sufficient number of sticks A being laid upon one another and firmly bolted together by means of iron rods 5 passed through holes 6 in each of the sticks A.

It is well known that an ordinary wooden door completely covered with sheet-tin makes an excellent fireproof door. It will be apparent that the practical advantages of this old form of door are found in my improved structure, because although in case of fire one or more of the pieces 2 may be burned away, yet ultimately the partitions or plates 3 will arrest the progress of the fire and keep it from reaching the other side of the stick from Whatever direction the fire may come, inasmuch as each transverse dimension of the stick is cut or intercepted by one or more of the plates 3, as above stated. Therefore while a structure built in accordance with my invention will be practically fireproof it at the same time has this advantage, that it presents the usual surface of the wood upon its exterior for the purposes of being nailed to, painted upon, &c., as in the case ,of the wooden material now commonly used.

I do not consider my invention to be limited to a piece of material made hollow or built up in the specific manner shown in the drawings, as it may obviously be applied to such building material in many other Ways.

I claim as my invention-- 1. A piece of fireproof building material composed of a number of wooden strips secured together with one edge of each strip opposed to the face of the next adjacent strip, the inner face of each strip being completely covered with a plate of incomhustible or fireproof material, whereby each transverse dimension of a piece of material is completely pletely separated by fireproof partitions or 10 intercepted by one or more of the fireproof plates, all substantially as and for the purpartitions, for the purpose set forth. pose set forth.

2. A fireproof structure formed of a n nm- In testimony whereof I have hereunto subberof separate, superimposed building-sticks scribed my name this 8d day of March, 1898. bolted together by means of rods passed JOHN M. STIMPSON. through holes in the same, each of said sticks being composed of a number of strips secured together with their inner adjacent faces com Witnesses:

E. D. CHAD\\"ICK, E. B. TOMLINSON. 

